Machine for covering fabrics and other objects with material in the form of powder.



L. DBSTREZ. MACHINE FOR COVERING FABRICS AND OTHER OBJECTS WITH MATERIAL IN THE FORM OF POWDER.

APPLICATION FILED MAR. 2, 1912.

PatentedJuly 21, 191 i UNITED STATESPATEN T OFFICE.

LEON ALBERT nnsrnnz, or PARIS, FRANCE.

MACHINE FOR COVERING FABRICS AND OTHER OBJECTS WITH MATERIAL IN,THE

- FORM OF'POWDER.

Specification of Letters'latent. g Patented J 111ly2 1, 191 4.

Application filed an 2, 1m. serial in. 681,229.

Machines for Covering Fabrics and. other Objects with Material in the Form of Pow-.

der, which improvements are fully set forth in the following specification.

This invention relates to the coating of objects with'cork or other material in the form of powder, and it contemplates, briefly, the provision of an improved machine wherein the coating is efiected by the direct agency of a blower nozzle that operates in the manner of an injector under the action of compressed air, with which the owder is entrained, as opposed to the or inary method of simply applying the powder upon an object previously coated with a suitable adher sive substance. More particularly, however, the invention proposes a machine of 'the class or character above indicated which is specially designed for coating objects of circula'r or curved section, such as round belts,

electric conductors and the like, for which purpose it is provided with an improved form of blower nozzle consisting of an-mternally-slit ring through whose central opening the object 'to be powdered travels, so that all parts of the object are thus subjected to the act-ion of the spray.

An embodiment of the invention is illustr 'fated in the accompanying drawing, where,- o a Figure 1 is 'a diagrammatic view of the machine; Fig. 2 is an enlarged side elevation ofthe form of blower nozzle used for spraying plane-surfaced objects; and Figs. 3 and 4% are, respectively, a side elevation and atransverse section of the afore-mentioned annular nozzle used for spraying roundsurfaced objects.

Referring to said drawing, the material to be powdered, which may be either, the

cable or round belt 14, (Figs. 1, 3 and 4),

or the fiat belt l, (Fig. 2), passes over an endless band 2 which draws it underneath a vessel 3 containing a rubber solution or other adhesive preparation. The preparation contained in this vessel flows out through an orifice in the bottom thereof and drops on: the material .to be coated which advances through the machine ata suitable speed.

.1 trainedwith the hesive, the material enters a closed chamber 5 and passes beneath a receptacle 7 wherein the powdered corkis contained, through the top of which container leads one end of a pipe 9 whose other end is connected to a compressed air reservoir 10 supplied from a suitable compressor. The bottom of this container is equipped with the blower nozzle by which the powdered cork is sprayed upon thematerial. \Vhere the-material to be powdered i'sin the nature of a fabric, flat belt or other plane-surfacedobject 1, the fanshaped nozzle .6, best shown in Fig. 2, is utilized, this nozzle being dis osed at the proper distance above'the fabrlc and being provided with a bottom slit or discharge orifice that is disposed transversely of the fabric and-is reguletable as to its effective or working length. by means .of movable end. plates to. conform to thewidth of the. fabric. The said nozzle 6 has: also connect ed to it one end of an air-supply pipe 8 which is likewise connected-atits other end i to the reservoir, the arrangement being such, therefore, .that the powder forced" by the pressure of the air supplied to the container through pipefi) into the nozzle becomes en--- air supplied thereto through pipe 8 and is blown through the discharge orifice of the nozzle, so that the action is comparable, in effect to that of an injector.

When a cable, conductor, or similar roundsurfaced object 14 is to be coated, the nozzle 11, represented in detail in Figs. 3 and 4 is employed, said nozzle beingconstructed, as therein'shown, in the form of a ring or annulus, the inner peripheral wall of which is provided with a continuous slit or discharge orifice 13. The upper portion of this nozzle is formed with a straight, tubular extension 12 which may be connected in any desired manner with the bottom portion of the powder container 7. v

y In the construction illustrated, the said 'ex-' tension is shown as removably attached at K said cable 'from all sides, owing to the continuous character of slit 13.

In the construction just described, it is to be assumed that the ipe 8 is connected to nozzle 6, as in the rst form, so that for both forms the action is substantially the same, the 'owder sprayed under pressure not only a hering to the coated surface of the material undergoing treatment but also penetrating the interstices of the material tov a greateror less extent, according to the character or composition of the material itself and to the degree of air pressure. After having thus been treated, the material passes bener th abrush 11 serving to wipe off the excess powder, and, on leaving the cham 7 ber 5, may be calendered and dried, and finally vulcanized in 'any desired'manner.

Having now described my invention what I claim as new and desire to secure by Let ters Patent is i 1. In a machine for coating round-sur faced material with powder, the combination of a conveyer for feeding the material,

means for applying adheslve material to with the air entering the nozzllgilsprayed: un-.

der pressure against the said esive-coated "surface and forced by such pressure to enter the interstices of said material.

-2. In a machine for coatmg round-surfaced material with powder, the combina-' tion of a powder container provided at its bottom with an annular blower nozzle having a continuous internal peripheral delivery slit, means for feeding the material concentrically through said nozzle, a source of compressed air supply, and a pipe leading from said air-supply source into said container for spraying the powder under pressure ,throughsaid slit against said material.

3. In a machine for coating round-surfaced material' with owder, the combination of means for' eedingr the material, means for applying adhesive material to the surface to be coated, a powder. container provided at its bottom with an annular blower nozzle through which said material is fed concentrically, said nozzle having an internal peripheral delivery slit which faces said surface, a source of compressed air supply,

and a pipe leading from said air-supply source into said container for spraying the powder under pressure against the said ad' hesive-coated surface. V

Intestimony whereof I have specification in the ing witnesses.

LEON ALBERT DESTREZ.

- Witnesses:

EMILE LEDRETL GEORGE LIGHT.

signed this presence of two subscrib- 

